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Because collecting information from the whole population may not be possible, may take too long or may be very expensive. Furthermore, if a sample is well designed, the improvement in accuracy of the results will diminish rapidly so there is little to be gained from collecting all the data.
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What is a numerical value used as a summary measure for a sample called such as a sample mean?
sampl statistics
When can statistics be used to gain information about a population from a sample?
When the sample - whether it is random or systematic - is somehow representative of the population.
Why inferential statistics is not required in census?
Inferential statistical methods are used when data is collected from a sample in the population. Inferential statistics are used to generalize the results of the sample to the population. In a census you have data from each and every member of the population, so you just use descriptive statistics.
The constant rate used as a gauge in calculating the valid sample size?
statistics
Techniques used to determine something about a population based on a sample?
Inferential statistics
What is a numerical value used as a summary measure for a sample called such as a sample mean?
sampl statistics
What type of statistics employ the use of sample data that is used to infer information about the population?
Inferential statistics.
Are Greek letters used for statistics or for parameters?
Greek letters are used for population parameters. Eg: µ is the population mean English letters are used for sample statistics. Eg: x-bar is the sample mean
What is represenatative sample of population?
A representative sample is one where the statistics of the sample are the same as the statistics for the parent population.
In statistics the group of individuals used to represent the population is called the?
sample.
When can statistics be used to gain information about a population from a sample?
When the sample - whether it is random or systematic - is somehow representative of the population.
Why inferential statistics is not required in census?
Inferential statistical methods are used when data is collected from a sample in the population. Inferential statistics are used to generalize the results of the sample to the population. In a census you have data from each and every member of the population, so you just use descriptive statistics.
How can descriptive statistics be used to understand a samples characteristics?
Will a sample descriptive statistics accurately estimate the underlying population's parameters?
The constant rate used as a gauge in calculating the valid sample size?
statistics
Techniques used to determine something about a population based on a sample?
Inferential statistics
What is the constant rate used as a gauge in calculating the valid sample size?
Statistics
Three reasons why samples are used in statistics?
There are a few reasons why samples are used in statistics. One reason is that the whole population cannot be used and a sample is a good representation of the whole.
